The Sensordrone packs a myriad of environmental sensors that can provide information about the world around you into a device small enough to fit on a keyring.

Developed as a Kickstarter project, the wireless device transmits information to your smartphone using Bluetooth and runs a countless number of useful applications. The sensor device measures humidity levels in the air and monitors temperature, can detect traces of carbon monoxide in a room and can also act as an impromptu breathalyzer to test your Blood Alcohol Content -- just to name a few of its features.

After starting an application on one's phone, turning the sensor into a stud finder for example, the multifunctional gadget goes to work and transmits all the necessary information back to your phone for analysis.